The newspaper is reporting that a number of senior ANC leaders and National Executive Committee (NEC) members opposed to President Jacob Zuma have faced numerous death threats over the past year.

Sisulu, in particular, is seen as a threat to Nkosazana Dlamini-Zuma’s bid to succeed Zuma as head of the ruling party in December.

She’s considered to be such a big threat that there were two attempts on her life – once in June and again in October last year.

“She [Sisulu] was advised by those in the security establishment about the threatened assassinations. She is aware of those and this is partly the reason why she is keeping a low profile when it comes to issues of succession,” an ANC source was quoted saying.

READ MORE: ANC top officials admit “mistake” in speaking out

ANC chief whip Jackson Mthembu who has been publically and exceptionally scathing of Zuma, and ANC secretary-general Gwede Mantashe who last week spoke out against Zuma’s cabinet reshuffle – have reportedly been sent threatening messages.

They have both allegedly been branded CIA spies hell bent on muddying Zuma’s name.

Mthembu has also reportedly been accused of colluding with opposition parties to plot a coup against Zuma and came under attack from Zuma supporters at the party’s National Working Committee (NWC) meeting this week for coming out in support of axed former Finance Minister Pravin Gordhan.

“He [Mthembu] is being targeted for doing what is right for the ANC. Last year, we [the ANC caucus] held a midterm meeting and decided we should do what is right and nothing that brings the ANC into disrepute or act against the Constitution,” an ANC MP was quoted saying.

READ MORE: Jackson Mthembu guns for ANC NEC

Earlier this week, Mantashe was forced to admit that it was a mistake for ANC leaders to talk out publically against Zuma in an attempt to present a united front.

But, the most recent revelations of death threats and spy allegations levelled against some of the party’s most senior leadership figures, clearly illustrates deep divisions within the ruling party.